colon

问题 Apparently a colon is used in multiple ways in Java. Would anyone mind explaining what it does? For instance here: String cardString = \"\"; for (PlayingCard c : this.list) // <-- { cardString += c + \"\\n\"; } How would you write this for-each loop a different way so as to not incorporate the : ? 回答1: There are several places colon is used in Java code: 1) Jump-out label (Tutorial): label: for (int i = 0; i < x; i++) { for (int j = 0; j < i; j++) { if (something(i, j)) break label; // jumps

问题 I am getting errors from customers who are uploading files with a colon in the file name, i.e. C:/uploads/test : doc.html I assume that some Unix or Linux system is generating the file but I\'m not sure how the users are saving them with the invalid filename. I have coded a piece that should rename the document on upload. My problem is that I can\'t test it because I can\'t get a file on Windows that has a colon in the filename. 回答1: I found a very similar character to a colon, "꞉" it is a

问题 This question already has answers here : Closed 6 years ago . Possible Duplicate: What does this C++ code mean? I\'m trying to map a C structure to Java using JNA. I came across something that I\'ve never seen. The struct definition is as follows: struct op { unsigned op_type:9; //---> what does this mean? unsigned op_opt:1; unsigned op_latefree:1; unsigned op_latefreed:1; unsigned op_attached:1; unsigned op_spare:3; U8 op_flags; U8 op_private; }; You can see some variable being defined like